Graf and Sons still has Kragbrass in stock. That's where I got mine. I haven't loaded any of it yet because I'm still using the reformed .303 brass I got before the Krag brass became available.
The reformed .303 brass works fine. Neck is a little shorter than Krag brass but still longer than the original .303 necks because the shoulder was set back.
I've had no trouble loading ammo to the correct overall length.
Edit: Looks like Graf has the Hornady brass back in stock for a slightly lower price. Now you have a choice of two brands of Krag brass.